Berlin 2012 – scientific programme
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O: Fachverband Oberflächenphysik
O 72: [MA] Joint Session "Surface Magnetism III" (jointly with O)
O 72.1: Talk
Thursday, March 29, 2012, 15:15–15:30, BH 243
Ultimate limit of electron-spin precession upon reflection in ferromagnetic films — A. Hallal1, T. Berdot1, P. Dey1, L. Tati Bismaths1, L. Joly1, A. Bourzami2, F. Scheurer1, H. Bulou1, •J. Henk3, M. Alouani1, and W. Weber1 — 1Institut de Physique et Chimie des Matériaux de Strasbourg, France — 2Université Ferhat-Abbas, Sétif, Algeria — 3Max-Planck-Institut für Mikrostrukturphysik, Halle, Germany
We report the discovery of 180∘ electron-spin precession in spin-polarized electron-reflection experiments on Fe films on Ag(001) [1], the largest possible precession angle in a single electron reflection. Both experiments as a function of Fe film thickness and ab initio calculations show that the appearance of this ultimate spin precession depends with utmost sensitivity on the relaxation of the Fe surface layers during growth. Similar spin precession is also predicted for other ferromagnetic films.
[1] A.Hallal et al., Phys. Rev. Lett. 107 (2011) 087203.